Kelly Clarkson has fun on stage "no matter what size" she is.

The 30-year-old singer has been sporting a slimmer frame of late, after struggling with a fluctuating figure over the past few years.

Kelly - who is currently filming for new TV show Duets - has revealed that she's put minimum effort into her weight loss.

"There's no secret!" she exclaimed to US Weekly. "It's just trying to eat a little better and work out a little more. But no matter what size I am I love performing no matter how big or little I am! I feel good."

Kelly has also lightened her locks. Earlier this month, the star traded her brunette tresses for blonde, and says the transformation has been a fun one.

"I love it!" she smiled.

"People keep asking me if I am having more fun, being blonde, but I always have fun! Whether I'm blonde, redhead, or brunette! I always have fun, dammit!"